Verification of PBV driving performance for universal mobility using suspension module test rig

Seungmin Kwon･Hyunjae Lee･David Song･Seonghun Kim･Jongho Ko･Yongsub Yi (Hyundai Motor)

In this study, we conducted a system-level performance verification and real-vehicle level performance prediction of a low-floor suspension (transverse leaf spring CTBA) to be applied to TSD-R1. We analyzed the behavior and stiffness of the suspension during the handling maneuver through K&C characteristic evaluation using SPMD testing. We also analyzed the ride comfort characteristics by analyzing the load transmitted to the chassis mounting points through system-level ride comfort evaluation, and predicted the real-vehicle unit performance based on this.

Development of MF(Magic Formula) Tire Model Application Technique

Jinhee Lee (Hyundai Motor)

One of the important factors in vehicle dynamics simulation is to express the interaction between the tire and the road surface accurately because the behavior of the vehicle depends on the force and moment applied to the tire. MF(Magic Formula) tires are mainly used in most vehicle dynamics SW to express tire characteristics that show nonlinear and complex behavior against the load applied to tires with various contact conditions. This paper proposes a method for effectively utilizing tire models in the vehicle performance development stage. The first of them is to immediately extract the major tire characteristics from the tire model, and the second is to find a model parameter combination that satisfies the target tire characteristics by applying an optimization technique.

A Study on Harmonic Performance for EV SUV Aftershock Improvement
-In View of Frequency Seperation and Bushing Cahracteristics-

TAEHEE LEE･DAE-UN SUNG･YONG-HYUN RYU (Hyundai Motor)･SU-HYUN LIM (PH Company)･JIN-HWAN OH (DH R&T Company)

In the event of an impact such as a bump, the tendency to worsen aftershocks(or post-impact oscillaton) and low-frequency driving vibrations increased. What are the characteristics of a vehicle with excellent rear-wheel aftershocks? Compared to the characteristics of a vehicle with unfavorable rear-wheel aftershocks, most important differences could be identified

Vehicle Motion Control on Electric Vehicles
-Capabilities on connecting Chassis and Powertrain Features-

Tobias Vosshall･Martin Dorn･Thomas Reckeweg･Frank Schummers･Michael Struth (FEV)

This paper presents a novel approach to vehicle motion control on electric vehicles, which aims to coordinate and manage multiple vehicle systems and controllers across all vehicle domains. It defines the prerequisites to enable vehicle motion control, such as vehicle architecture, communication, sensors and actors. Focusing on connecting chassis and powertrain features selected software functions are developed in a Matlab/Simulink environment and verified in a co-simulation environment of Matlab/Simulink and CarSim. The paper concludes that the proposed motion controller can enhance the vehicle performance, efficiency, and safety.

Mechanism Design of Suspension and Steering Systems for Balancing Mobility and Maneuverability

Mengjian Tian (Shenzhen Technology University)

To make human society more convenient, high-speed vehicles are increasingly expected to possess low-speed mobility, such as the ability to rotate in place or move laterally, enabling more flexible movement. Consequently, the question of what kind of suspension and steering systems are required has been raised.
For instance, ensuring high-speed stability and steerability necessitates setting a small scrub radius for the suspension. However, achieving flexibility during low-speed operation requires a large steering angle for the tires. To prevent motion interference, it may be necessary to increase the scrub radius or compromise the rigidity of the suspension and steering systems to some extent.
To address these challenges, it is crucial to conduct research into the design of new suspension and steering system mechanisms, taking into account factors such as suspension geometry, coexistence with in-wheel motors, and various other elements.